Cell Zone Conditions & Boundary Conditions
Cell Zone Conditions & Boundary Conditions
Cell zone and boundary conditions specify the thermal variables and flow variables on the boundaries of your
physical model. Therefore, They are critical things of your ANSYS Fluent simulations and it is
important that they are specified properly.
Cell Zone Conditions
There are mainly two cell zones available in ANSYS.
(1) Fluid
(2) Solid
Porous zones in ANSYS Fluent are treated as fluid zones. Detailed information of the various cell zones is given bellow.
Solid
It is also a group of small cell. In solid cell groups, flow equations are not solved, only a heat conduction problem is solved in solid cell zone. The computational domain is treated as a solid. The type of solid material is the input for a solid zone. Refer above fig a, change material type as fluid to solid by click on the “Material type” option. you can choose default solid material which is already stored in a fluent database. if required solid material is not available in a fluent database then you can create solid material by click on “User Defined Database” and apply the appropriate properties of solid.
Fluid
A fluid zone is a cell group for which equations are solved. The input required for a fluid zone is the fluid material ( water, petrol, diesel, oil, air, etc..) which will flow through the body . It is required to identify the material which is flowing through the fluid zone. so that the proper material properties will be used. You can set material properties by click on material > fluid. The following dialog box will open as shown in fig.
Boundary Conditions
Boundary conditions must be carefully applied at all boundaries of the computational domain. proper boundary conditions give accurate results. there are many types of boundary conditions use in ANSYS like velocity inlet and outflow, pressure inlet and pressure outlet, mass flow rate, inlet vent, intake fan, outlet vent, and exhaust fan.
The most used boundary conditions are velocity inlet and outflow, pressure inlet and pressure outlet, mass flow rate. Here we show some basics of these boundary conditions.
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